5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
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Looking to twin turbo my 89 lx. Going to keep the engine stock except for the required fuel upgrades, except maybe for a cam. What would you guys suggest for seals and piston rings? Planning on resealing everything, and would like fresh rings just because. Thanks guys

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I have a question about this , and I may show my ignorance here but on a stock 5.0 why would you bother with twin turbo , would not a single turbo suffice in this case.

Is there an advantage to twin turbo on a stock block as apposed to single? Would you not be able to obtain the max boost on a stock block with single set up.
Im not questioning the knowledge you have , as Im not a turbo guy . Purely investigative question.

I have a question about this , and I may show my ignorance here but on a stock 5.0 why would you bother with twin turbo , would not a single turbo suffice in this case.

Is there an advantage to twin turbo on a stock block as apposed to single? Would you not be able to obtain the max boost on a stock block with single set up.
Im not questioning the knowledge you have , as Im not a turbo guy . Purely investigative question.

It's just because it's what is available to me. Was going to do a blower but sisters husband decided he wanted to use it after all, and offered the twin turbos to me.

Don't try and install your rear main seal with the #5 cap still on. Not the correct way to do it. For the pan - make sure the gasket is set correctly in the groove on the timing cover and #5 cap. After you get it all put back together, take some black rtv and smooth it over that same area.

Oil leaks suck.

Also be sure you gap your rings correctly. I do 0.020 top ring, 0.024 bottom ring on an N/A set up. You will need to open yours up a little bit due to the boost.

While we're on the topic of oil & rings & boost, may want to look at switching from the factory pcv set up. As your rpm builds, your boost will build, especially with twins. If you opened up your rings as suggested, the boost will create blow by as expected. This will greatly increase crankcase pressure. A lot of turbo guys switch to a breather + catch can set up because the pcv system can't ventilate the crankcase pressure effectively. This pressure has to go somewhere as new pressure from the turbos is getting past the rings. It usually finds its way out via the rear main seal, oil pan gasket, etc.

Don't try and install your rear main seal with the #5 cap still on. Not the correct way to do it. For the pan - make sure the gasket is set correctly in the groove on the timing cover and #5 cap. After you get it all put back together, take some black rtv and smooth it over that same area.

Oil leaks suck.

Also be sure you gap your rings correctly. I do 0.020 top ring, 0.024 bottom ring on an N/A set up. You will need to open yours up a little bit due to the boost.

While we're on the topic of oil & rings & boost, may want to look at switching from the factory pcv set up. As your rpm builds, your boost will build, especially with twins. If you opened up your rings as suggested, the boost will create blow by as expected. This will greatly increase crankcase pressure. A lot of turbo guys switch to a breather + catch can set up because the pcv system can't ventilate the crankcase pressure effectively. This pressure has to go somewhere as new pressure from the turbos is getting past the rings. It usually finds its way out via the rear main seal, oil pan gasket, etc.

Theres your circle of life between boost and rings. Lol

all very true ,, but from the sounds of it he will be building a 331 R block in no time lmao

Don't try and install your rear main seal with the #5 cap still on. Not the correct way to do it. For the pan - make sure the gasket is set correctly in the groove on the timing cover and #5 cap. After you get it all put back together, take some black rtv and smooth it over that same area.

Oil leaks suck.

Also be sure you gap your rings correctly. I do 0.020 top ring, 0.024 bottom ring on an N/A set up. You will need to open yours up a little bit due to the boost.

While we're on the topic of oil & rings & boost, may want to look at switching from the factory pcv set up. As your rpm builds, your boost will build, especially with twins. If you opened up your rings as suggested, the boost will create blow by as expected. This will greatly increase crankcase pressure. A lot of turbo guys switch to a breather + catch can set up because the pcv system can't ventilate the crankcase pressure effectively. This pressure has to go somewhere as new pressure from the turbos is getting past the rings. It usually finds its way out via the rear main seal, oil pan gasket, etc.

You'll see a crack in the main around the main bolt holes, either #1 or #2 from what I've seen. It'll spider up the front of the block. The block literally tries to split itself. Probably scary as hell when it happens, the after math looks pretty cool lol. Lets hope you dont have an expensive bottom end, 'bout the only thing a girdle is good for is keeping it from grenading everywhere

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